@CHARSET "UTF-8";
#p{
	border:1px solid #0000ff;
	width:500px;
	height:500px;
	position:relative;
	top:100px;
	left:100px;	
}
#c1,#c2,#c3,#c4{
	border:1px solid #ff0000;
	width:100px;
	height:100px;
	position:relative;
}

#c1{}
#c2{top:-102px;left:101px;}
#c3{top:-102px;left:101px;}
#c4{top:-204px;}